IFS have developed PU (polyurethane) foam systems specifically for the insulation of water cylinders either by spray application or by liquid injection between the central water reservoir and an outer metal casing. Spray systems are applied to the rotating cylinder, building in layers to a thickness of 40mm or more. These materials are characterised by their bright green colour, indication that they are manufactured from the very best environmentally-friendly chemicals. This method of production allows for the build-up of varying thicknesses and resultant variations in the insulation U-value.
Many water heaters (including the one shown) use an insulation system where a two-component foam is liquid-dispensed into the cavity between the tank and the outer casing. In some cases the manufacturing process does not allow for high foaming pressures because the hot water cylinders are not mechanically supported during the foaming process. For this reason, IFS developed a series of foams specifically for this application.
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